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Revision flashcards
Fichas del conjunto (19)
- 1What is a computer network?A computer network is a collection of computers joined together using a network such as a bus, ring or star network.
- 2What is a WAN?A WAN is a wide area network that covers a large geographical area and is used on things such as phones.
- 3What is a LAN?A LAN is a local area network that covers a small geographical area which supports things like schools and work networks.
- 4What are the advantages of a computer network?Data is transferred quickly depending on the network.
- 5What is a router used for ?A router is used to connect devices to another network wirelessly. It converts data from cables into wireless signals.
- 6What is a wireless access point?A home and business may use a wireless access point to connect their network to another network such as the internet.
- 7What is the purpose of a hub/switch?It either supports wired or wireless connections.
- 8What is the internet?The internet is a network of networks that uses IP addresses to communicate.
- 9What is the world wide web?The world wide web is a collection of web pages on the internet.
- 10What is the purpose of an ISP?An ISP is responsible for making sure you can access the internet.
- 11What is the purpose of a URL?A URL is made up of words, not numbers, and is used by humans to type in words and find websites.
- 12List examples of data that need to be kept secureYour bank details, address, personal information, security codes or passwords.
- 13What does a DNS do?It matches an IP address to a domain name.
- 14What is encryption and why encrypt data?We encrypt data to stop it from being read, but it can't stop it from being intercepted. Encryption is basically when you scramble a normal word so it is unreadable without a key.
- 15What are the advantages and disadvantages of a bus network?Advantage: It is cheap to install and easy to add other devices.
Disadvantage: If the main cable goes down so do all other devices on the network. - 16What are the advantages and disadvantages of a ring network?Advantages: its cheap to install and very quick - there's no data collision
Disadvantages: If one computer goes down then the whole system shuts down. - 17What are the advantages and disadvantages of a star network?Advantages: It is very reliable and shares data very fast.
Disadvantages: Its very expensive because of all the cable attached to devices. - 18What are the three different topologies?Bus, ring, and star are the three different topologies.
- 19What are the disadvantages of a computer network?A computer network can be expensive to install, and you may need an employed network manager to handle and maintain it.
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- Descripción
- Fichas sobre Revision flashcards, creado por Lana Toehill el 02/03/2020.
- Creado por
- Lana Toehill · mar 2020
- Actualizado
- 16 mar 2020
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